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Zhou Y, Firkowska-Boden I, Arras MML, Jandt KD. Polystyrene Homopolymer Enhances Dispersion of MWCNTs Stabilized in Solution by a PS- b-P2VP Copolymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:391-399. [PMID: 33356302 DOI: 10.1021/acs.langmuir.0c03042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Block copolymers (BCPs) have previously been identified as powerful multiwalled carbon nanotube (MWCNT) dispersants in solution. However, relatively high costs and limited dispersibility hinder the use of BCPs in large-scale practical applications. Partial replacement of BCP with a low-cost homopolymer (HP) offers a promising approach to produce cost-effective MWNCT dispersions. The effect of HP/BCP blends on MWNCT dispersion degree and stability has yet to be elucidated. In this work, we tested the hypothesis that HP-induced BCP micelle size variation affects MWCNT dispersibility. Here, blends of the BCP poly(styrene)-block-poly(2-vinylpyridine) and the HP polystyrene (PS) were applied to examine BCP micelles' size dependence on the MWCNT dispersion degree. Light microscopy results showed that using HP/BCP blends, MWCNT dispersion was enhanced by up to 263% compared to pure BCP at a constant weight ratio of BCP to MWCNTs. Based on the correlation of increased MWCNT dispersion degree with increased BCP micelle size, as revealed by dynamic light scattering, an MWCNT dispersion mechanism is proposed. The mechanism includes a rationale for the unexpected finding that HP PS swells the BCP micelle's PS corona in a good solvent for PS. Using HP to increase MWCNT dispersion is a promising approach with possible applications in the production of high-performance composite materials. This holds especially for formulations of practical relevance where often (BCP) dispersants are only one of many components in the material.
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Affiliation(s)
- Yingying Zhou
- Chair of Materials Science, Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
- School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, P.R. China
| | - Izabela Firkowska-Boden
- Chair of Materials Science, Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Matthias M L Arras
- Chair of Materials Science, Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Klaus D Jandt
- Chair of Materials Science, Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
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Arras MM, He B, Jandt KD. High molar mass amphiphilic block copolymer enables alignment and dispersion of unfunctionalized carbon nanotubes in melt-drawn thin-films. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.08.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Alzaid M, Roth J, Wang Y, Almutairi E, Brown SL, Dumitrică T, Hobbie EK. Enhancing the Elasticity of Ultrathin Single-Wall Carbon Nanotube Films with Colloidal Nanocrystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7889-7895. [PMID: 28742968 DOI: 10.1021/acs.langmuir.7b01988] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Thin bilayers of contrasting nanomaterials are ubiquitous in solution-processed electronic devices and have potential relevance to a number of applications in flexible electronics. Motivated by recent mesoscopic simulations demonstrating synergistic mechanical interactions between thin films of single-wall carbon nanotubes (SWCNTs) and spherical nanocrystal (NC) inclusions, we use a thin-film wrinkling approach to query the compressive mechanics of hybrid nanotube/nanocrystal coatings adhered to soft polymer substrates. Our results show an almost 2-fold enhancement in the Young modulus of a sufficiently thin SWCNT film associated with the presence of a thin interpenetrating overlayer of semiconductor NCs. Mesoscopic distinct-element method simulations further support the experimental findings by showing that the additional noncovalent interfaces introduced by nanocrystals enhance the modulus of the SWCNT network and hinder network wrinkling.
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Affiliation(s)
- Meshal Alzaid
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Joseph Roth
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Yuezhou Wang
- Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities , Minneapolis, Minnesota 55455, United States
| | - Eid Almutairi
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Samuel L Brown
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Traian Dumitrică
- Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities , Minneapolis, Minnesota 55455, United States
- Department of Mechanical Engineering, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Erik K Hobbie
- North Dakota State University , Fargo, North Dakota 58108, United States
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Le T, Collazos N, Simoneaux A, Murru S, Depan D, Subramaniam R. Statistical modelling and simulation of nanohybrid shish-kebab architecture of PE-b-PEG copolymers and carbon nanotubes. Phys Chem Chem Phys 2017; 19:13348-13360. [PMID: 28492681 DOI: 10.1039/c7cp00597k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon nanotubes have been known to develop hierarchically ordered polymer nanocomposites by virtue of epitaxial crystallization. A unique product of CNT induced crystallization is generation of nanohybrid shish-kebab (NHSK) structure, which has gained tremendous attention owing to its unique applications. However, research faces major challenges in terms of producing tunable patterns on CNTs, which are largely governed by precise control of the crystallization parameters. Conventional methods of experimentation can mislead the effect of experimental conditions on NHSK structure. The effect of crystallization time, undercooling temperature and polymer concentration on the NHSK architecture of carbon nanotubes (CNTs) and on a block copolymer, polyethylene-b-polyethylene glycol (PE-b-PEG), was studied in this work by applying the Response Surface Methodology (RSM). The present novel investigation mainly reports the statistical models that can be used to predict the different NHSK structural features such as diameter, periodicity, and thickness by including the interaction and quadratic effects of experimental variables. The developed models are in very good agreement with the experimental data and are statistically significant. Our novel approach can be used to better understand the interplay between various crystallization parameters for periodic patterning on carbon nanotubes to generate tunable hierarchical structures.
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Affiliation(s)
- Tuan Le
- Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, LA 70503, USA.
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Garate H, Bianchi M, Pietrasanta LI, Goyanes S, D'Accorso NB. High-Energy Dissipation Performance in Epoxy Coatings by the Synergistic Effect of Carbon Nanotube/Block Copolymer Conjugates. ACS APPLIED MATERIALS & INTERFACES 2017; 9:930-943. [PMID: 28004915 DOI: 10.1021/acsami.6b13212] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Hierarchical assembly of hard/soft nanoparticles holds great potential as reinforcements for polymer nanocomposites with tailored properties. Here, we present a facile strategy to integrate polystyrene-grafted carbon nanotubes (PSgCNT) (0.05-0.3 wt %) and poly(styrene-b-[isoprene-ran-epoxyisoprene]-b-styrene) block copolymer (10 wt %) into epoxy coatings using an ultrasound-assisted noncovalent functionalization process. The method leads to cured nanocomposites with core-shell block copolymer (BCP) nanodomains which are associated with carbon nanotubes (CNT) giving rise to CNT-BCP hybrid structures. Nanocomposite energy dissipation and reduced Young's Modulus (E*) is determined from force-distance curves by atomic force microscopy operating in the PeakForce QNM imaging mode and compared to thermosets modified with BCP and purified carbon nanotubes (pCNT). Remarkably, nanocomposites bearing PSgCNT-BCP conjugates display an increase in energy dissipation of up to 7.1-fold with respect to neat epoxy and 53% more than materials prepared with pCNT and BCP at the same CNT load (0.3 wt %), while reduced Young's Modulus shows no significant change with CNT type and increases up to 25% compared to neat epoxy E* at a CNT load of 0.3 wt %. The energy dissipation performance of nanocomposites is also reflected by the lower wear coefficients of materials with PSgCNT and BCP compared to those with pCNT and BCP, as determined by abrasion tests. Furthermore, scanning electron microscopy (SEM) images taken on wear surfaces show that materials incorporating PSgCNT and BCP exhibit much more surface deformation under shear forces in agreement with their higher ability to dissipate more energy before particle release. We propose that the synergistic effect observed in energy dissipation arises from hierarchical assembly of PSgCNT and BCP within the epoxy matrix and provides clues that the CNT-BCP interface has a significant role in the mechanisms of energy dissipation of epoxy coating modified by CNT-BCP conjugates. These findings provide a means to design epoxy-based coatings with high-energy dissipation performance.
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Affiliation(s)
- Hernan Garate
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Micaela Bianchi
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Lía I Pietrasanta
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Silvia Goyanes
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Norma B D'Accorso
- CIHIDECAR-CONICET, Departamento de Química Orgánica, FCEyN-UBA, §Centro de Microscopías Avanzadas, FCEyN-UBA, ⊥LP&MC, and ‡IFIBA-CONICET, Departamento de Física, FCEyN-UBA, Ciudad Universitaria , 1428, Ciudad Autónoma de Buenos Aires, Argentina
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Feng Q, Tang D, Lv H, Zhang W, Li W. Temperature-responsive zinc oxide nanorods arrays grafted with poly(N-isopropylacrylamide) via SI-ATRP. RSC Adv 2015. [DOI: 10.1039/c5ra07301d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanocomposites based on ZnO nanorods, with photocatalysis and temperature responsibility, could be fabricated by grafting poly(N-isopropylacrylamide) PNIPAM via surface-initiated atom transfer radical polymerization (SI-ATRP).
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Affiliation(s)
- Qian Feng
- Department of Chemistry
- School of Science
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Dongyan Tang
- Department of Chemistry
- School of Science
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Haitao Lv
- Department of Chemistry
- School of Science
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Weile Zhang
- Department of Chemistry
- School of Science
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Wenbo Li
- Department of Chemistry
- School of Science
- Harbin Institute of Technology
- Harbin 150001
- China
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